Superconductivity and short-range order in metallic glasses FexNi1−xZr2
J. Lefebvre, M. Hilke, Z. Altounian
DOI 10.1103/PhysRevB.79.184525 · Physical Review B
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Abstract
In amorphous superconductors, superconducting and vortex-pinning properties are strongly linked to the absence of long-range order. Consequently, superconductivity and vortex phases can be studied to probe the underlying microstructure and order of the material. This is done here from resistance and local magnetization measurements in the superconducting state of FexNi1−xZr2 metallic glasses with 0≤x≤0.6. First, we present typical superconducting properties such as the critical temperature and fields and their dependence on Fe content in these alloys. Then, the observations of peculiar clockwise hysteresis loops, wide double-step transitions, and large magnetization fluctuations in glasses containing a large amount of Fe are analyzed to reveal a change in short-range order with Fe content. The results further shed light on our understanding of the interplay among superconducting coherence lengths, material microstructure, and pinning and how they can influence superconducting transitions in transport measurements.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NiZr2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure not reported | midpoint |
| Fe0.1Ni0.9Zr2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | midpoint |
| Fe0.5Ni0.5Zr2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | midpoint |
| Fe0.6Ni0.4Zr2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.2 | Pressure not reported | midpoint |
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